Bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -23,7 +23,7 @@ jobs:
 
         steps:
             -   name: Checkout code
-                uses: actions/checkout@v6
+                uses: actions/checkout@v7
 
             -   name: Setup PHP
                 uses: shivammathur/setup-php@v2
@@ -71,7 +71,7 @@ jobs:
 
         steps:
             -   name: Checkout code
-                uses: actions/checkout@v6
+                uses: actions/checkout@v7
 
             -   name: Setup PHP
                 uses: shivammathur/setup-php@v2
@@ -125,7 +125,7 @@ jobs:
 
         steps:
             -   name: Checkout code
-                uses: actions/checkout@v6
+                uses: actions/checkout@v7
 
             -   name: Fix for Postgres Client
                 run: |